Construction Progress Report April 2008 Wet Weather Improvements Project Central Marin Sanitation Agency
Table of Contents Section 1
Executive Summary
Section 2
Project Photos
Section 3
Logs
Executive Summary Contract Number
07-01
General Contractor
Western Water Constructors
Contract Bid Amount
$35,550,000.00
Change Orders to Date
4
Pending/Anticipated Change orders
7 items
Notice to Proceed
October 8, 2007
Original Contract Time
910 calendar days
Working Days Elapsed
205
Working Days Remaining
705
Milestone 1 (CCT & EPS)
July 29, 2009
Milestone 2 (All other work)
March 6, 2010
Rain days – Accepted to date
7 of 50 included within contract time
Contract Change Order(s) Time Extension
0
Final Completion Date
April 5, 2010
Total Project Time Expended
22.5%
Total Project Cost Expended
29.5%
Work Progress during April 2008 by Area or System: 1. General: Western Water proposed an alternate installation of the 84” x 66” wye at the outfall area. This proposal was reviewed by the Agency and Engineer, who requested additional information and research before acceptance of the proposed installation. (At the beginning of May, Western Water’s research concluded that the proposed alternate installation would not be possible based on the steel cylinder thickness.) Western Water submitted the March 2008 monthly schedule update. No major changes to the project baseline schedule were noted. Western Water (WW) maintained the Storm Water Pollution Prevention Plan best management practices (BMPs). Western Water has submitted rain event inspection forms for the project files. Western Water continues routine weekly safety tailgate meetings, weekly safety checks, as well as the monthly safety audit performed by WW’s safety officer. Written reports of all meetings, checks and safety audits have been submitted for the record.
2. Polymer Facility: Western Water continued the installation of the new polymer lines, 3-water and 1-water lines from the west side of the plant road to the pipe sleeves in the structure walls and encased the new pipes in controlled low strength material (CLSM).
Western Water and their electrical subcontractor, Aspen Timco, continued trenching and installing the electrical duct bank from the polymer facility to the CMSA Administration Building following the alternate routing plan, approved in Change Order No. 003. The pull box remains to be installed in this area; the duct bank has been encased with red concrete and backfilled, and conduits have been installed into the Administration Building.
3. Gallery A & B Improvements, including Grit Chamber 3 and Headworks Western Water rerouted the fire water piping, channel air and Ross Valley Pre-chlorination lines in Gallery A in preparation for the primary influent channel connection and other demolition work. Western Water installed a portion of the grit pump piping. Western Water demolished the parapet wall at the south end of Gallery A/B. They also cut out the wall below the parapet for the influent channel connection and covered the opening with framed plywood for the interim until further work is completed in this area. Western Water set the Aeration Blower in place in the blower room and installed the piping for the plant air to be connected to the aeration blower.
4. Primary Clarifiers 6 & 7 Subcontractor Stroer & Graff began installing the Type 1 shoring (soldier beam and lagging) for the primary clarifiers. Soldier beams were installed in the area, but have not crossed the current plant road yet.
5. Chlorine Contact Tanks (CCT) 5 & 6 Western Water completed the excavation and backfill with CLSM by mid-April. Western Water placed and compacted 6-inches of aggregate base in preparation for forming the slabon-grade for the CCT. Subcontractor Condon-Johnson began installation of the six drilled concrete piers which will support the new influent channel from the existing chlorine contact tanks to the new tanks.
6. Effluent Pump Station (EPS) After completing the excavation and backfill as noted above for the CCT, Western Water began forming for the slab-on-grade. They also formed and placed the concrete for the drain sump slab-on-grade.
7. Secant Retaining Wall and other Site improvements Subcontractor Condon Johnson completed the secant pile retaining wall with the float finish of the Shotcrete face. Western Water installed forms, placed and compacted aggregate base material and tied reinforcing steel for the v-ditch behind the secant pile retaining wall. Western Water began constructing a temporary access road where the new road will be permanently installed. The Ross Valley Interceptor pipe under this new road location is not encased as it is under the current road. Carollo Engineers is working on a design to protect the pipe under the new road. Western Water will either avoid crossing the Ross Valley Interceptor in the new road or will only run empty trucks over that area until the new design is received and installed over the pipe.
8. Aeration Tanks Aspen Timco, electrical subcontractor, continued installation of conduits on the aeration tank control building. This work will continue in the month of May and connections made during scheduled maintenance shutdowns of the tanks.
9. Review Item Summary Please see attached open RFI and Submittal logs in Section 3 for details of the following outstanding items.
Review Items
Total Received to Date
RFIs Submittals Certified Payroll
67 231 141
Number Received in April 12 48 25
Number Returned / Reviewed in April 9 34 25
10. Change Order Summary Approved Change Orders Contract Change Order No. 001 Contract Change Order No. 002
Description
Cost
One-time relocation of PG&E gas Line
$0.00
Miscellaneous Small Changes (9 items)
$1,043.00
Contract Change Order No. 003
Electrical/Instrumentation Conduit Routing to Administration Building - $0.00 Additional 3W Service at Polymer Truck Pad - $5,332.00 Shotcrete Finish at Secant Pile Retaining Wall - $21,500.00 Grit Blower Piping - Stainless Steel vs. Carbon - $6,371.00 Rerouting polymer lines at Headworks deck – ($1,000.00) Manhole at Eastern Drainage Ditch Infill - $7,200.00 Slab extension on north side of Polymer Facility - $1,000.00 Pipe Ts in lieu of pipe saddles in Galleries - $0.00
Negotiated $40,403
Contract Change Order No. 004
Secant pile retaining wall additional work over Ross Valley Interceptor per Design Clarification No. 002, performed on time and material.
Pending $54,228.23
Pending Change Orders
Contract Change Order No. 005
Description
1) Electrical Grounding System – shown on drawings to connect to steel beams at three structures which do not have steel beams. 2) Reroute scum drain at primary clarifiers 6 & 7 Western Water proposed alternate routing of the scum drain at clarifiers 6 & 7 to reduce the number of turns in the pipe
Cost
Pending Cost to be determined
3) 4) 5) 6) 7)
Value Engineering Items
run. This was reviewed and accepted by the Engineer and Agency. Increase length of new flare deck to match existing pad dimension. Personnel gate in fence on secant pile retaining wall Additional 40 linear feet of fence for fall protection on secant pile retaining wall. Credit to change copper plates to stainless steel at secant pile retaining wall. Credit to delete factory witness test requirement for Grit Classifier
a) Excavation and Shoring Changes at Chlorine Contact Tank Area: Western Water proposed an alternate method to excavate and place the controlled low strength material in the chlorine contact tank area. This method was accepted by the Agency. The cost savings of this method will be shared by the Agency and Western Water.
Pending Savings to be determined
10. Apprentices Three apprentices worked on the project throughout the month of April, two electrical apprentices and one general laborer.
Work Activities planned for May 2008: • • • • • • • • • • • • •
Complete installation of soldier beam and lagging shoring with tie backs at the primary clarifier area Begin excavation at the primary clarifier area Continue forming and reinforcing steel installation at Chlorine Contact Basin and Effluent Pump Station. Begin concrete placement of slab and wall sections at the effluent pump station and chlorine contact tanks Complete v-ditch behind the secant pile retaining wall. Install fence along top of secant pile retaining wall Complete installation of the electrical duct bank around Primary Clarifiers 6 and 7 Complete installation of electrical duct bank and temporary power from Switchgear Building to the effluent pump station. Complete installation of grated trench drain Complete installation of electrical duct bank from new polymer facility to the existing administration building. Continue installation of exposed electrical conduit at existing aeration tanks Continuation of Storm Water Pollution Prevention Plan Submittals provided for review, including schedule update.
Wet Weather Improvements April 2008 Photos taken 04.30.2008
Progress Photo 01 - Overview of Outfall Area
Progress Photo 02 – Effluent Pump Station and Chlorine Contact Tank Area backfilled for formwork.
Wet Weather Improvements April 2008 Photos taken 04.30.2008
Progress Photo 03 – Chlorine Contact Tank & Effluent Pump Station Area backfilled and compacted.
Progress Photo 4 – View East from Solids Handling Building
Wet Weather Improvements April 2008 Photos taken 04.30.2008
Progress Photo 05 – View West from Solids Handling Building; Secant Pile Retaining Wall, Grated Trench Drain and Primary Clarifier Shoring
Progress Photo 06 – View East from Headworks Building; Secant Pile Retaining Wall and Primary Clarifier Shoring
Wet Weather Improvements April 2008 Photos taken 04.30.2008
Progress Photo 07 – Grated Trench Drain east of switchgear building, in front of secant pile retaining wall
Progress Photo 08 – V-Ditch formed and reinforcing steel placed behind Secant Pile Retaining wall
Wet Weather Improvements April 2008 Photos taken 04.30.2008
Progress Photo 09 – Demolition and removal of Parapet and wall at south end of Gallery A.
Progress Photo 10 – Placed Concrete for Drilled Concrete Piers at Chlorine Contact Tank.
Wet Weather Improvements April 2008 Photos taken 04.30.2008
Progress Photo 11 – Backfill to Polymer Facility north side.
Progress Photo 12 – Electrical conduits entering Administration Building from Polymer Facility.
Central Marin Sanitation Agency CMSA - Wet Weather Improvement
Open Requests for Information
07-01 Project No: 061-0491.01 Job No:
RFI Number From 00039
To
WESTWATR HARRIS
Title CCT 1-4 Modifications 16-Inch 3W
Change Issue
Status Request OPN
Date: 4/30/2008 1 of 1 Page: Dated
On sheet M-9.5 of the drawings typical detail S200 notes 1/31/2008 that concrete will be chipped and hammered out an oversized hole in order to recover existing rebar and place and grout a wall spool for the 16 inch 3 water pipe line to pass through the existing Chorine Contact Tank Walls.
Responded
Required 2/6/2008
We propose to core drill a 20 inch hole for the 16 inch pipe. For each of the three interior walls we propose to use 1 link seal grouted in on both sides with 10,000 lbs grout. For each of the two exterior walls we propose to use 2 link seals grouted in on both sides and between using 10,000lbs grout. This is our recommendation. Thank you 00061
WESTWATR HARRIS
PG&E Pull Box
OPN
4/15/2008 The PG&E box at the north end of the plant is sitting approx. 1’ to 2’ lower than Grade. The PG&E inspector said that an extension ring was necessary to bring the box to grade. As this was not in the bid documents, it will be additional work. If this work is required, ATI will proceed upon approval of Change Order. Verify requirement and approve Change Order, if necessary.
4/22/2008
00065
WESTWATR HARRIS
Conduit Penetration at Switchgear
OPN
Per the above mentioned drawings, we are to provide a 4/29/2008 thru-wall seal when penetrating the wall. As the conduit will be stubbing out of the back of the pull box, we do not know how the seal will work. Please provide a detail showing the use of thru-wall seal, when used coming out of a pull box.
4/30/2008
Report r_a_rfi_03_harris
Central Marin Sanitation Agency CMSA - Wet Weather Improvement
Open Submittal Log - Sorted by Submittal No. Job No:
07-01
Date: 4/30/2008 1 of 2 Page:
Project No: 061-0491.01 Rev. Title
Status
193
02810-1.04
02810
001
Underground Sprinkler System
R&R
3/6/2008
3/7/2008
3/18/2008
3/21/2008
WESTWATR
161
03200-1.05-CCT 03200
002
Chlorine Contact Tank Rebar
R&R
4/1/2008
4/4/2008
4/14/2008
4/15/2008
WESTWATR
192
05500-1.03-A.2
05500
Access Hatch for Valve Vault
R&R
3/4/2008
3/6/2008
3/24/2008
3/25/2008
WESTWATR
220
07510-001
07510
001
Roofing Product Data
OPN
4/8/2008
4/11/2008
CAROLLO
221
07510-002
07510
001
Roofing - Samples
OPN
4/8/2008
4/11/2008
CAROLLO
217
07510-003
07510
Roofing - Installation Instructions
OPN
4/8/2008
4/11/2008
CAROLLO
217
07510-004
07510
Roofing - UL & FM Certificates
OPN
4/8/2008
4/11/2008
CAROLLO
217
07510-005
07510
Roofing - Warranty
OPN
4/8/2008
4/11/2008
183
11293-1.04
11293
Fabricated Slide Gates
R&R
3/18/2008 3/18/2008
3/27/2008
3/28/2008
WESTWATR
183
11294-1.05 A-E
11294
Cast Iron Sluice Gates
R&R
3/18/2008 3/18/2008
3/27/2008
4/1/2008
WESTWATR
228
11312D-1.05A
11312D
Vertical Propeller Pumps
OPN
4/24/2008 4/24/2008
118
11312F-1.05-A
11312F
001
GromanRupp Model T6A3S-B Pump
R&R
12/18/2007 12/18/2007
1/9/2008
1/10/2008
WESTWATR
118
11312F-1.11.B
11312F
001
Spare Parts List
R&R
12/18/2007 12/18/2007
1/9/2008
1/10/2008
WESTWATR
118
11312F-2.11.B
11312F
001
US Motors Model H15P3B
R&R
12/18/2007 12/18/2007
1/9/2008
1/10/2008
WESTWATR
150
11312I-1.05
11312I
002
Progressing Cavity Pumps
OPN
4/29/2008 4/30/2008
210
11312J-2.01-B1
11312J
001
Submersible Sump Pump
R&R
3/20/2008 3/21/2008
4/17/2008
4/18/2008
WESTWATR
131
11312K-1.05
11312K
002
Submersible Sump Pumps (EPS)
R&R
2/14/2008 2/14/2008
2/25/2008
2/29/2008
WESTWATR
162
11312O-1.05A
11312O
002
Horizontal End Suction Pump w/O&M
OPN
4/29/2008 4/30/2008
229
11318-1.04A,B,G 11318
001
Diesel Engine Drive System
OPN
4/24/2008 4/24/2008
212
11343-1.04 B-D
11343
Helical Scum Skimmers
R&R
3/27/2008 3/31/2008
4/28/2008
4/29/2008
WESTWATR
189
11351-001
11351
001
1.04-A Product Data
R&R
3/4/2008
3/6/2008
4/3/2008
4/7/2008
WESTWATR
189
11351-002
11351
001
1.04-B Shop Dwgs. & Calculations
R&R
3/4/2008
3/6/2008
4/3/2008
4/7/2008
WESTWATR
189
11351-003
11351
001
1.04-C Manufacturer's Dwgs
R&R
3/4/2008
3/6/2008
4/3/2008
4/7/2008
WESTWATR
189
11351-004
11351
001
1.04-D.2 Manufacturer's Instruct.
R&R
3/4/2008
3/6/2008
4/3/2008
4/7/2008
WESTWATR
189
11351-005
11351
001
1.05-A.2 List of Installations
R&R
3/4/2008
3/6/2008
4/3/2008
4/7/2008
WESTWATR
189
11351-006
11351
001
1.08 Warranty
R&R
3/4/2008
3/6/2008
4/3/2008
4/7/2008
WESTWATR
189
11351-007
11351
001
1.09-B.2 Spare Parts List
R&R
3/4/2008
3/6/2008
4/3/2008
4/7/2008
WESTWATR
002OM
11376-1.05-F
11376
001
Aeration Blowers - O&M
R&R
2/12/2008 2/13/2008
2/20/2008
2/25/2008
WESTWATR
114
11378-1.05-D
11378
002
Coarse Bubble Aeration System - O&M
OPN
2/27/2008 2/27/2008
220
12347-1.02-A&B
12347
001
Lab Casework, Sink, & Fixture
OPN
4/15/2008 4/16/2008
117
13120-1.03-A
13120
002
FRP Launders
R&R
2/19/2008 2/19/2008
3/24/2008
4/1/2008
WESTWATR
117
13120-1.03-A 1
13120
002
FRP Launders - Drawing B10
R&R
2/19/2008 2/19/2008
3/24/2008
4/1/2008
WESTWATR
117
13120-1.03-A2
13120
002
FRP Launders - Drawing B11
R&R
2/19/2008 2/19/2008
3/24/2008
4/1/2008
WESTWATR
117
13120-1.03-A3
13120
002
FRP Launders - Drawing B12
R&R
2/19/2008 2/19/2008
3/24/2008
4/1/2008
WESTWATR
117
13120-1.03-A4
13120
002
FRP Launders - Drawing B13
R&R
2/19/2008 2/19/2008
3/24/2008
4/1/2008
WESTWATR
163
13209-1.04
13209
001
Above Ground Fuel Storage Tank
R&R
1/29/2008 1/30/2008
3/31/2008
3/31/2008
WESTWATR
166
13422-2.01
13422
001
Rotameter Flow Field Instrument
R&R
1/31/2008 2/1/2008
2/13/2008
2/15/2008
WESTWATR
213
13422-2.01 & 2
13422
001
Rotameter Type Flowmeter
R&R
3/27/2008 3/31/2008
4/23/2008
4/24/2008
WESTWATR
213
13422-2.02
13422
001
Thermal Flow Switches
R&R
3/27/2008 3/31/2008
4/23/2008
4/24/2008
WESTWATR
213
13422-2.03 & 4
13422
001
Magnetic Flow Meter
R&R
3/27/2008 3/31/2008
4/23/2008
4/24/2008
WESTWATR
213
13422-2.06
13422
001
Water Flow Switches
R&R
3/27/2008 3/31/2008
4/23/2008
4/24/2008
WESTWATR
213
13423-2.01
13423
001
Float Type Level Switches
R&R
3/27/2008 3/31/2008
4/23/2008
4/24/2008
WESTWATR
213
13424-2.01
13424
001
Pressure Switches
R&R
3/27/2008 3/31/2008
4/23/2008
4/24/2008
WESTWATR
183
13445-1.04
13445
002
Hydraulic Cylinder Operators
R&R
3/18/2008 3/18/2008
3/27/2008
4/1/2008
WESTWATR
183
13446-1.03
13446
002
Valve & Gate Operators
R&R
3/18/2008 3/18/2008
3/27/2008
4/1/2008
WESTWATR
199
13452-1.02-A
13452
001
RTU and Distributed I/O System
OPN
3/18/2008 3/19/2008
4/17/2008
199
13453-1.03-A
13453
001
HMI & SCADA System - Product Data
OPN
3/18/2008 3/19/2008
4/17/2008
173
14624-1.04-A&B
14624
Monorail Hoist & Trolley System
R&R
2/1/2008
3/24/2008
3/25/2008
034
15112-1.04A-C.1 15112
003
Butterfly Valves
OPN
4/29/2008 4/30/2008
213
15120-2.09
001
Pressure Gauges
R&R
3/27/2008 3/31/2008
4/23/2008
4/24/2008
15120
2/4/2008
Forward
Required Finish
Package
002
Rcvd.
Latest Dates Sent Return
Item No. Submittal
BIC
CAROLLO
CAROLLO
CAROLLO
CAROLLO CAROLLO
CAROLLO CAROLLO
HARRIS HARRIS WESTWATR CAROLLO WESTWATR Report r_sb_01_c_01
Central Marin Sanitation Agency CMSA - Wet Weather Improvement
Open Submittal Log - Sorted by Submittal No. Job No:
07-01
Date: 4/30/2008 2 of 2 Page:
Project No: 061-0491.01 Rcvd.
Latest Dates Sent Return
Package
Rev. Title
Status
145
15772-001
15772
001
Heat Tracing Cable
R&R
1/3/2008
1/4/2008
218
15812-1.04 A&B
15812
001
Metal Ductwork
OPN
4/3/2008
4/11/2008
CAROLLO
224
15814-1.03-B
15814
001
FRP Ductwork Shop Drawings
OPN
4/17/2008 4/18/2008
CAROLLO
129
15830-2.01
15830
002
Type 1, Down Blast Centrifugal Roof
NEW
4/17/2008 4/18/2008
CAROLLO
129
15830-2.02
15830
002
Type 2, Up-Blast Centrifugal Roof
OPN
4/17/2008 4/18/2008
CAROLLO
129
15830-2.03
15830
002
Type 3, In Duct Fan
OPN
4/17/2008 4/18/2008
CAROLLO
225
15852-1.04-A
15852
001
Louver - Shop Drawings
OPN
4/17/2008 4/18/2008
CAROLLO
226
15855-1.04-A
15855
001
Air Handling Units - Shop Drawings
OPN
4/17/2008 4/18/2008
CAROLLO
149
16123-001
16123
003
Type TC Wire- 2.02.A&B
OPN
4/22/2008 4/24/2008
CAROLLO
149
16123-002
16123
003
Typw TC Inst. Cable - 2.03.A&B
OPN
4/22/2008 4/24/2008
CAROLLO
149
16123-003
16123
003
Terminal Products
OPN
4/22/2008 4/24/2008
CAROLLO
149
16123-004
16123
003
Cable Pulling Lubricant - 2.06.C
OPN
4/22/2008 4/24/2008
CAROLLO
149
16123-005
16123
003
Noalox Anti-Oxident Compound
OPN
4/22/2008 4/24/2008
CAROLLO
223
16133-Details
16133
001
Conduit Layout E-4.18 - E-4.21
OPN
4/17/2008 4/18/2008
CAROLLO
222
16133-Prim. Cl.
16133
001
Primary Clarifier Conduit Layout
OPN
4/17/2008 4/18/2008
CAROLLO
149
16134-005
16134
003
SS 4X Enclosures - 2.05.A
OPN
4/22/2008 4/24/2008
CAROLLO
149
16140-009
16140
003
Al Control Enclosures - 2.08.D
OPN
4/22/2008 4/24/2008
CAROLLO
149
16140-010
16140
003
Pilot Devices - 2.09
OPN
4/22/2008 4/24/2008
201
16144-1.02-A
16144
001
Disconnect Switches
R&R
3/12/2008 3/13/2008
4/1/2008
4/3/2008
WESTWATR
200
16273-1.03-A
16273
001
Low Voltage Distribution Transform
R&R
3/12/2008 3/13/2008
4/1/2008
4/3/2008
WESTWATR
231
16342-1.04-A
16342
001
600V Motor Control Center - Shp Dwg
OPN
4/29/2008 4/30/2008
CAROLLO
203
16416-1.03-B
16416
001
Transient Voltage Surge Suppressors
OPN
4/17/2008 4/17/2008
CAROLLO
204
16448-1.04-A
16448
001
Panelboards - Product Data
OPN
4/17/2008 4/17/2008
CAROLLO
230
16500-1.03-A
16500
001
Lighting - Product Data w/Seismic
OPN
4/29/2008 4/30/2008
CAROLLO
230
16500-1.03-B
16500
001
Lighting - Finish Sample
OPN
4/29/2008 4/30/2008
CAROLLO
1/17/2008
Forward
Required Finish
Item No. Submittal
1/18/2008
BIC WESTWATR
CAROLLO
Report r_sb_01_c_01
